fix: add set_quiet_hours method and quiet hours persistence

- Add set_quiet_hours() method and quiet_hours_enabled property to ClockService
- Add quiet hours save/restore to app.py _load_config() and save_config()
- Add tests for new method and property

Fixes #18

Author: Orinks

src/accessiclock/app.py

@@ -157,6 +157,18 @@ def _load_config(self) -> None:
                 self.chime_half_hour = self.config.get("chime_half_hour", False)
                 self.chime_quarter_hour = self.config.get("chime_quarter_hour", False)
 
+                # Restore quiet hours
+                if self.config.get("quiet_hours_enabled", False) and self.clock_service:
+                    from datetime import time as dt_time
+                    try:
+                        sh, sm = map(int, self.config["quiet_start"].split(":"))
+                        eh, em = map(int, self.config["quiet_end"].split(":"))
+                        self.clock_service.set_quiet_hours(dt_time(sh, sm), dt_time(eh, em))
+                    except (KeyError, ValueError) as e:
+                        logger.warning(f"Failed to restore quiet hours: {e}")
+                elif self.clock_service:
+                    self.clock_service.quiet_hours_enabled = False
+
                 logger.info(f"Configuration loaded from {config_file}")
             except Exception as e:
                 logger.warning(f"Failed to load config: {e}")
@@ -165,13 +177,24 @@ def save_config(self) -> None:
         """Save configuration to file."""
         import json
 
+        quiet_config = {}
+        if self.clock_service and self.clock_service.quiet_hours_enabled:
+            quiet_config = {
+                "quiet_hours_enabled": True,
+                "quiet_start": self.clock_service.quiet_start.strftime("%H:%M"),
+                "quiet_end": self.clock_service.quiet_end.strftime("%H:%M"),
+            }
+        else:
+            quiet_config = {"quiet_hours_enabled": False}
+
         self.config.update(
             {
                 "volume": self.current_volume,
                 "clock": self.selected_clock,
                 "chime_hourly": self.chime_hourly,
                 "chime_half_hour": self.chime_half_hour,
                 "chime_quarter_hour": self.chime_quarter_hour,
+                **quiet_config,
             }
         )
 

src/accessiclock/services/clock_service.py

@@ -121,6 +121,29 @@ def _is_quiet_time(self, current_time: time) -> bool:
             # Quiet hours within same day
             return self.quiet_start <= current_time < self.quiet_end
 
+    @property
+    def quiet_hours_enabled(self) -> bool:
+        """Return whether quiet hours are currently enabled."""
+        return self.quiet_start is not None and self.quiet_end is not None
+
+    @quiet_hours_enabled.setter
+    def quiet_hours_enabled(self, value: bool) -> None:
+        """Enable or disable quiet hours. Disabling clears start/end times."""
+        if not value:
+            self.quiet_start = None
+            self.quiet_end = None
+
+    def set_quiet_hours(self, start: time, end: time) -> None:
+        """
+        Set quiet hours range.
+
+        Args:
+            start: Start time for quiet hours.
+            end: End time for quiet hours.
+        """
+        self.quiet_start = start
+        self.quiet_end = end
+
     def reset_chime_tracking(self) -> None:
         """Reset the chime tracking (e.g., after settings change)."""
         self._last_chime_minute = None

tests/test_clock_service.py

@@ -255,3 +255,29 @@ def test_overnight_quiet_hours_boundaries(self):
         assert service.should_chime_now(time(23, 0, 0)) is None
         # Exactly at end - outside quiet hours
         assert service.should_chime_now(time(7, 0, 0)) == "hour"
+
+    def test_set_quiet_hours_method(self):
+        """set_quiet_hours should configure start and end times."""
+        from accessiclock.services.clock_service import ClockService
+
+        service = ClockService()
+        service.set_quiet_hours(time(22, 0), time(6, 0))
+
+        assert service.quiet_start == time(22, 0)
+        assert service.quiet_end == time(6, 0)
+        assert service.quiet_hours_enabled is True
+
+    def test_quiet_hours_enabled_property(self):
+        """quiet_hours_enabled should reflect whether quiet hours are set."""
+        from accessiclock.services.clock_service import ClockService
+
+        service = ClockService()
+        assert service.quiet_hours_enabled is False
+
+        service.set_quiet_hours(time(22, 0), time(6, 0))
+        assert service.quiet_hours_enabled is True
+
+        service.quiet_hours_enabled = False
+        assert service.quiet_hours_enabled is False
+        assert service.quiet_start is None
+        assert service.quiet_end is None